Memoize => b
If the option is set to true then all the values of the jacobiTrudi function that are computed are recorded into a special hash table attached to the symmetric ring inside which the computations are done.
The source of this document is in /build/reproducible-path/macaulay2-1.25.06+ds/M2/Macaulay2/packages/SchurRings.m2:2184:0.